An orca eats fish at the Marineland animal exhibition park in Antibes, southeastern France, Thursday, December 12, 2013. Marineland Antibes was founded in 1970. First it was a small oceanarium with a few pools and animals but now it is one of the biggest in the world and receives more than 1,200,000 visitors per year. (Photo by Lionel Cironneau/AP Photo)

This undated image provided by the Sars International Center for Marine Molecular Biology, University of Bergen, Norway via the journal Science in December 2013 shows a Mnemiopsis leidyi, a species of comb jelly known as a sea walnut. A new study published online Thursday, December 12, 2013 in the journal Science says comb jellies, a group of gelatinous marine animals, represent the oldest branch of the animal family tree. (Photo by AP Photo/Sars International Center for Marine Molecular Biology, University of Bergen, Norway, Bruno Vellutini)

A flock of pigeons flies with a prototype “parcelcopter” of the German postal and logistics group Deutsche Post DHL, on December 9, 2013. The device is a modified microdrone that costs $54,900 and can carry packages up to 2.65 pounds (1.2 kg). (Photo by Wolfgang Rattay/Reuters)

Flamingos stand in their enclosure as its snows in the Jerusalem Biblical Zoo, on December 12, 2013. (Photo by Baz Ratner/Reuters)

Men watch dogs fight during its weekly event in Kabul, Afghanistan, on December 13, 2013. Dog fighting is a popular form of entertainment during the winter season in the country held every Friday, which is the official weekly holiday. Dogs do not fight until death but rather until one dog pins another, or one of them runs away. (Photo by Rahmat Gul/Associated Press)

These picture capture the hilarious moment a cheeky little bee decides to pick on a grumpy bear. A massive Kodiak bear is finding this pesky bee a pain in the bear-hind as it buzzes around his head just out of reach. This incredible comedic moment was captured in the bear den at Buffalo Zoo. Terry Cervi from Buffalo, New York, U.S.A. saw this incredible sight on one of her regular visits to her local zoo. (Photo by Terry Cervi/Caters News)

Dublin Zoo is delighted to announce the birth of a female white crowned mangabey. The baby, born on 11th November, is the latest arrival at the Zoo and weighs a healthy 400 grams. The yet-to-be named infant is the third infant born to Tema and Danso. With a strong relationship between mother and infant the new arrival is settling in well. (Photo by Patrick Bolger/PA Wire)

A Sunshine International Aquarium staff member dressed in a Santa Claus costume embraces a Zebra shark as he swims with fish inside the aquarium in Tokyo, Wednesday, December 11, 2013. (Photo by Shizuo Kambayashi/AP Photo)

A nasua yawns and stretches at its enclosure of the zoo in Berlin on December 11, 2013. (Photo by Teresa Fischer/AFP Photo/DPA)

These baboons show they really are cheeky monkeys by breaking into a flat, stealing food and proudly parading their loot. (Photo by Cyril Ruoso/Minden Pictures/Solent News & Photo Agency)

A Pakistani employee shows a crocodile hatchling to unseen visitors at the Wildlife Experience Centre in Karachi on December 8, 2013. Newborn hatchlings are approximately 22cm long and weigh around 60g. (Photo by Rizwan Tabassum/AFP Photo)

These birds might look how most of us feel with Christmas preparations looming but luckily despite appearances they haven't really lost their heads. (Photo by Caters News Agency)

Standing among protesters, a pet monkey grabs a Thai national flag at Democracy Monument in Bangkok, Thailand, on December 8, 2013. (Photo by Vincent Thian/AP Photo)

These pictures show the moment a disgruntled crocodile realised he was having his picture snapped. (Photo by Caters News Agency)

A tiger picks up its newborn cub in its mouth in a cage at the Viviana Orfei Circus of Italy on Manoel Island in Valletta's Marsamxett Harbour, on December 11, 2013. (Photo by Darrin Zammit Lupi/Reuters)

These micro piglets are feeling festive and have starred in their own range of Christmas cards. (Photo by Caters News Agency)

Dolphins jump out of the water at the Marineland animal exhibition park in the French Riviera city of Antibes, southeastern France, on December 12, 2013. (Photo by Valery Hache/AFP Photo)

Close up of a tiger shark eating a fish fed to him by diver Vincent Canabal at Tiger Beach, Bahamas. (Photo by Daniel Botelho/Barcroft Media)

A large flock of starlings fly illuminated by the setting sun near Bacau, north eastern Romania, Tuesday, December 10, 2013. Large numbers of starlings populate the vast cereal growing agricultural lands in eastern Romania, feeding on the seeds already laid in the ground. (Photo by Vadim Ghirda/AP Photo)

A woman tries on a fur outfit at the “Christmas Art Fair-2013” in Almaty, Kazakhstan, on December 13, 2013. (Photo by Shamil Zhumatov/Reuters)

A contestant bites the tail of one of the bulls to make it run faster, as he races a pair of bulls at an oxen race competition held at a paddy field in Malappuram, India, on December 8, 2013. (Photo by T. Mohandas/Associated Press)

A diver dressed in a Santa Claus costume performs with sardines at the Coex Aquarium in Seoul, South Korea, Tuesday, December 10, 2013. Christmas is one of the biggest holidays in South Korea, where over half of the population are Christians. (Photo by Ahn Young-joon/AP Photo)

Sheepdog Otto rounds up a flock of organic, free range, bronze-feathered turkeys at Hook House Farm in Kirby Fleetham, England, on December 9, 2013. The farm is run by Steven Pearson and has been in his family for three generations. They went organic 13 years ago, now raising and preparing 400 turkeys per annum in a 20 acre field. (Photo by Nigel Roddis/Getty Images)